Omnivorous, feeding mainly on plants, but also on insects, fish, small mammals and young or sick deer.
Up to 20 years in the wild and over 30 years in captivity.
The female mates every 3 or 4 years from the age of 3 years old between late May and early July. The embryo develops after a delayed implantation during the last 6 to 8 weeks of a 6 to 9 month gestation period. On average 2-3 cubs are born in the lair between January and March. They are weaned around 5 months old.
Man, wolf and other grizzly bear that can attack cubs.